[linux-block.git] / drivers / gpu / drm / xe / xe_exec.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

#include "xe_exec.h"

#include <drm/drm_device.h>
#include <drm/drm_exec.h>
#include <drm/drm_file.h>
#include <drm/xe_drm.h>
#include <linux/delay.h>

#include "xe_bo.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
#include "xe_macros.h"
#include "xe_ring_ops_types.h"
#include "xe_sched_job.h"
#include "xe_sync.h"
#include "xe_vm.h"

/**
 * DOC: Execbuf (User GPU command submission)
 *
 * Execs have historically been rather complicated in DRM drivers (at least in
 * the i915) because a few things:
 *
 * - Passing in a list BO which are read / written to creating implicit syncs
 * - Binding at exec time
 * - Flow controlling the ring at exec time
 *
 * In XE we avoid all of this complication by not allowing a BO list to be
 * passed into an exec, using the dma-buf implicit sync uAPI, have binds as
 * seperate operations, and using the DRM scheduler to flow control the ring.
 * Let's deep dive on each of these.
 *
 * We can get away from a BO list by forcing the user to use in / out fences on
 * every exec rather than the kernel tracking dependencies of BO (e.g. if the
 * user knows an exec writes to a BO and reads from the BO in the next exec, it
 * is the user's responsibility to pass in / out fence between the two execs).
 *
 * Implicit dependencies for external BOs are handled by using the dma-buf
 * implicit dependency uAPI (TODO: add link). To make this works each exec must
 * install the job's fence into the DMA_RESV_USAGE_WRITE slot of every external
 * BO mapped in the VM.
 *
 * We do not allow a user to trigger a bind at exec time rather we have a VM
 * bind IOCTL which uses the same in / out fence interface as exec. In that
 * sense, a VM bind is basically the same operation as an exec from the user
 * perspective. e.g. If an exec depends on a VM bind use the in / out fence
 * interface (struct drm_xe_sync) to synchronize like syncing between two
 * dependent execs.
 *
 * Although a user cannot trigger a bind, we still have to rebind userptrs in
 * the VM that have been invalidated since the last exec, likewise we also have
 * to rebind BOs that have been evicted by the kernel. We schedule these rebinds
 * behind any pending kernel operations on any external BOs in VM or any BOs
 * private to the VM. This is accomplished by the rebinds waiting on BOs
 * DMA_RESV_USAGE_KERNEL slot (kernel ops) and kernel ops waiting on all BOs
 * slots (inflight execs are in the DMA_RESV_USAGE_BOOKING for private BOs and
 * in DMA_RESV_USAGE_WRITE for external BOs).
 *
 * Rebinds / dma-resv usage applies to non-compute mode VMs only as for compute
 * mode VMs we use preempt fences and a rebind worker (TODO: add link).
 *
 * There is no need to flow control the ring in the exec as we write the ring at
 * submission time and set the DRM scheduler max job limit SIZE_OF_RING /
 * MAX_JOB_SIZE. The DRM scheduler will then hold all jobs until space in the
 * ring is available.
 *
 * All of this results in a rather simple exec implementation.
 *
 * Flow
 * ~~~~
 *
 * .. code-block::
 *
 *	Parse input arguments
 *	Wait for any async VM bind passed as in-fences to start
 *	<----------------------------------------------------------------------|
 *	Lock global VM lock in read mode                                       |
 *	Pin userptrs (also finds userptr invalidated since last exec)          |
 *	Lock exec (VM dma-resv lock, external BOs dma-resv locks)              |
 *	Validate BOs that have been evicted                                    |
 *	Create job                                                             |
 *	Rebind invalidated userptrs + evicted BOs (non-compute-mode)           |
 *	Add rebind fence dependency to job                                     |
 *	Add job VM dma-resv bookkeeping slot (non-compute mode)                |
 *	Add job to external BOs dma-resv write slots (non-compute mode)        |
 *	Check if any userptrs invalidated since pin ------ Drop locks ---------|
 *	Install in / out fences for job
 *	Submit job
 *	Unlock all
 */

/*
 * Add validation and rebinding to the drm_exec locking loop, since both can
 * trigger eviction which may require sleeping dma_resv locks.
 */
static int xe_exec_fn(struct drm_gpuvm_exec *vm_exec)
{
	struct xe_vm *vm = container_of(vm_exec->vm, struct xe_vm, gpuvm);

	/* The fence slot added here is intended for the exec sched job. */
	return xe_vm_validate_rebind(vm, &vm_exec->exec, 1);
}

int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct xe_device *xe = to_xe_device(dev);
	struct xe_file *xef = to_xe_file(file);
	struct drm_xe_exec *args = data;
	struct drm_xe_sync __user *syncs_user = u64_to_user_ptr(args->syncs);
	u64 __user *addresses_user = u64_to_user_ptr(args->address);
	struct xe_exec_queue *q;
	struct xe_sync_entry *syncs = NULL;
	u64 addresses[XE_HW_ENGINE_MAX_INSTANCE];
	struct drm_gpuvm_exec vm_exec = {.extra.fn = xe_exec_fn};
	struct drm_exec *exec = &vm_exec.exec;
	u32 i, num_syncs, num_ufence = 0;
	struct xe_sched_job *job;
	struct xe_vm *vm;
	bool write_locked, skip_retry = false;
	ktime_t end = 0;
	int err = 0;

	if (XE_IOCTL_DBG(xe, args->extensions) ||
	    XE_IOCTL_DBG(xe, args->pad[0] || args->pad[1] || args->pad[2]) ||
	    XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1]))
		return -EINVAL;

	q = xe_exec_queue_lookup(xef, args->exec_queue_id);
	if (XE_IOCTL_DBG(xe, !q))
		return -ENOENT;

	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_VM))
		return -EINVAL;

	if (XE_IOCTL_DBG(xe, args->num_batch_buffer &&
			 q->width != args->num_batch_buffer))
		return -EINVAL;

	if (XE_IOCTL_DBG(xe, q->ops->reset_status(q))) {
		err = -ECANCELED;
		goto err_exec_queue;
	}

	if (args->num_syncs) {
		syncs = kcalloc(args->num_syncs, sizeof(*syncs), GFP_KERNEL);
		if (!syncs) {
			err = -ENOMEM;
			goto err_exec_queue;
		}
	}

	vm = q->vm;

	for (num_syncs = 0; num_syncs < args->num_syncs; num_syncs++) {
		err = xe_sync_entry_parse(xe, xef, &syncs[num_syncs],
					  &syncs_user[num_syncs], SYNC_PARSE_FLAG_EXEC |
					  (xe_vm_in_lr_mode(vm) ?
					   SYNC_PARSE_FLAG_LR_MODE : 0));
		if (err)
			goto err_syncs;

		if (xe_sync_is_ufence(&syncs[num_syncs]))
			num_ufence++;
	}

	if (XE_IOCTL_DBG(xe, num_ufence > 1)) {
		err = -EINVAL;
		goto err_syncs;
	}

	if (xe_exec_queue_is_parallel(q)) {
		err = __copy_from_user(addresses, addresses_user, sizeof(u64) *
				       q->width);
		if (err) {
			err = -EFAULT;
			goto err_syncs;
		}
	}

retry:
	if (!xe_vm_in_lr_mode(vm) && xe_vm_userptr_check_repin(vm)) {
		err = down_write_killable(&vm->lock);
		write_locked = true;
	} else {
		/* We don't allow execs while the VM is in error state */
		err = down_read_interruptible(&vm->lock);
		write_locked = false;
	}
	if (err)
		goto err_syncs;

	if (write_locked) {
		err = xe_vm_userptr_pin(vm);
		downgrade_write(&vm->lock);
		write_locked = false;
		if (err)
			goto err_unlock_list;
	}

	if (!args->num_batch_buffer) {
		err = xe_vm_lock(vm, true);
		if (err)
			goto err_unlock_list;

		if (!xe_vm_in_lr_mode(vm)) {
			struct dma_fence *fence;

			fence = xe_sync_in_fence_get(syncs, num_syncs, q, vm);
			if (IS_ERR(fence)) {
				err = PTR_ERR(fence);
				goto err_unlock_list;
			}
			for (i = 0; i < num_syncs; i++)
				xe_sync_entry_signal(&syncs[i], fence);
			xe_exec_queue_last_fence_set(q, vm, fence);
			dma_fence_put(fence);
		}

		xe_vm_unlock(vm);
		goto err_unlock_list;
	}

	vm_exec.vm = &vm->gpuvm;
	vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
	if (xe_vm_in_lr_mode(vm)) {
		drm_exec_init(exec, vm_exec.flags, 0);
	} else {
		err = drm_gpuvm_exec_lock(&vm_exec);
		if (err) {
			if (xe_vm_validate_should_retry(exec, err, &end))
				err = -EAGAIN;
			goto err_unlock_list;
		}
	}

	if (xe_vm_is_closed_or_banned(q->vm)) {
		drm_warn(&xe->drm, "Trying to schedule after vm is closed or banned\n");
		err = -ECANCELED;
		goto err_exec;
	}

	if (xe_exec_queue_is_lr(q) && xe_exec_queue_ring_full(q)) {
		err = -EWOULDBLOCK;	/* Aliased to -EAGAIN */
		skip_retry = true;
		goto err_exec;
	}

	job = xe_sched_job_create(q, xe_exec_queue_is_parallel(q) ?
				  addresses : &args->address);
	if (IS_ERR(job)) {
		err = PTR_ERR(job);
		goto err_exec;
	}

	/* Wait behind rebinds */
	if (!xe_vm_in_lr_mode(vm)) {
		err = xe_sched_job_add_deps(job,
					    xe_vm_resv(vm),
					    DMA_RESV_USAGE_KERNEL);
		if (err)
			goto err_put_job;
	}

	for (i = 0; i < num_syncs && !err; i++)
		err = xe_sync_entry_add_deps(&syncs[i], job);
	if (err)
		goto err_put_job;

	if (!xe_vm_in_lr_mode(vm)) {
		err = xe_sched_job_last_fence_add_dep(job, vm);
		if (err)
			goto err_put_job;

		err = down_read_interruptible(&vm->userptr.notifier_lock);
		if (err)
			goto err_put_job;

		err = __xe_vm_userptr_needs_repin(vm);
		if (err)
			goto err_repin;
	}

	/*
	 * Point of no return, if we error after this point just set an error on
	 * the job and let the DRM scheduler / backend clean up the job.
	 */
	xe_sched_job_arm(job);
	if (!xe_vm_in_lr_mode(vm))
		drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, &job->drm.s_fence->finished,
					 DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_WRITE);

	for (i = 0; i < num_syncs; i++) {
		xe_sync_entry_signal(&syncs[i], &job->drm.s_fence->finished);
		xe_sched_job_init_user_fence(job, &syncs[i]);
	}

	if (xe_exec_queue_is_lr(q))
		q->ring_ops->emit_job(job);
	if (!xe_vm_in_lr_mode(vm))
		xe_exec_queue_last_fence_set(q, vm, &job->drm.s_fence->finished);
	xe_sched_job_push(job);
	xe_vm_reactivate_rebind(vm);

	if (!err && !xe_vm_in_lr_mode(vm)) {
		spin_lock(&xe->ttm.lru_lock);
		ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
		spin_unlock(&xe->ttm.lru_lock);
	}

err_repin:
	if (!xe_vm_in_lr_mode(vm))
		up_read(&vm->userptr.notifier_lock);
err_put_job:
	if (err)
		xe_sched_job_put(job);
err_exec:
	drm_exec_fini(exec);
err_unlock_list:
	up_read(&vm->lock);
	if (err == -EAGAIN && !skip_retry)
		goto retry;
err_syncs:
	while (num_syncs--)
		xe_sync_entry_cleanup(&syncs[num_syncs]);
	kfree(syncs);
err_exec_queue:
	xe_exec_queue_put(q);

	return err;
}
Commit	Line	Data
dd08ebf6 MB	1	// SPDX-License-Identifier: MIT
	2	/*
	3	* Copyright © 2022 Intel Corporation
	4	*/
	5
ea9f879d LDM	6	#include "xe_exec.h"
ea9f879d LDM	7
dd08ebf6	8	#include <drm/drm_device.h>
d490ecf5	9	#include <drm/drm_exec.h>
dd08ebf6 MB	10	#include <drm/drm_file.h>
dd08ebf6 MB	11	#include <drm/xe_drm.h>
34f89ac8	12	#include <linux/delay.h>
dd08ebf6 MB	13
	14	#include "xe_bo.h"
	15	#include "xe_device.h"
c22a4ed0	16	#include "xe_exec_queue.h"
dd08ebf6	17	#include "xe_macros.h"
8ae8a2e8	18	#include "xe_ring_ops_types.h"
dd08ebf6 MB	19	#include "xe_sched_job.h"
	20	#include "xe_sync.h"
	21	#include "xe_vm.h"
	22
	23	/**
	24	* DOC: Execbuf (User GPU command submission)
	25	*
	26	* Execs have historically been rather complicated in DRM drivers (at least in
	27	* the i915) because a few things:
	28	*
	29	* - Passing in a list BO which are read / written to creating implicit syncs
	30	* - Binding at exec time
	31	* - Flow controlling the ring at exec time
	32	*
	33	* In XE we avoid all of this complication by not allowing a BO list to be
	34	* passed into an exec, using the dma-buf implicit sync uAPI, have binds as
	35	* seperate operations, and using the DRM scheduler to flow control the ring.
	36	* Let's deep dive on each of these.
	37	*
	38	* We can get away from a BO list by forcing the user to use in / out fences on
	39	* every exec rather than the kernel tracking dependencies of BO (e.g. if the
	40	* user knows an exec writes to a BO and reads from the BO in the next exec, it
	41	* is the user's responsibility to pass in / out fence between the two execs).
	42	*
	43	* Implicit dependencies for external BOs are handled by using the dma-buf
	44	* implicit dependency uAPI (TODO: add link). To make this works each exec must
	45	* install the job's fence into the DMA_RESV_USAGE_WRITE slot of every external
	46	* BO mapped in the VM.
	47	*
	48	* We do not allow a user to trigger a bind at exec time rather we have a VM
	49	* bind IOCTL which uses the same in / out fence interface as exec. In that
	50	* sense, a VM bind is basically the same operation as an exec from the user
	51	* perspective. e.g. If an exec depends on a VM bind use the in / out fence
	52	* interface (struct drm_xe_sync) to synchronize like syncing between two
	53	* dependent execs.
	54	*
	55	* Although a user cannot trigger a bind, we still have to rebind userptrs in
	56	* the VM that have been invalidated since the last exec, likewise we also have
	57	* to rebind BOs that have been evicted by the kernel. We schedule these rebinds
	58	* behind any pending kernel operations on any external BOs in VM or any BOs
	59	* private to the VM. This is accomplished by the rebinds waiting on BOs
	60	* DMA_RESV_USAGE_KERNEL slot (kernel ops) and kernel ops waiting on all BOs
	61	* slots (inflight execs are in the DMA_RESV_USAGE_BOOKING for private BOs and
	62	* in DMA_RESV_USAGE_WRITE for external BOs).
	63	*
	64	* Rebinds / dma-resv usage applies to non-compute mode VMs only as for compute
	65	* mode VMs we use preempt fences and a rebind worker (TODO: add link).
	66	*
	67	* There is no need to flow control the ring in the exec as we write the ring at
	68	* submission time and set the DRM scheduler max job limit SIZE_OF_RING /
	69	* MAX_JOB_SIZE. The DRM scheduler will then hold all jobs until space in the
	70	* ring is available.
	71	*
	72	* All of this results in a rather simple exec implementation.
	73	*
	74	* Flow
	75	* ~~~~
	76	*
	77	* .. code-block::
	78	*
	79	* Parse input arguments
	80	* Wait for any async VM bind passed as in-fences to start
	81	* <----------------------------------------------------------------------\|
	82	* Lock global VM lock in read mode \|
83	* Pin userptrs (also finds userptr invalidated since last exec) \|
84	* Lock exec (VM dma-resv lock, external BOs dma-resv locks) \|
85	* Validate BOs that have been evicted \|
86	* Create job \|
87	* Rebind invalidated userptrs + evicted BOs (non-compute-mode) \|
88	* Add rebind fence dependency to job \|
89	* Add job VM dma-resv bookkeeping slot (non-compute mode) \|
90	* Add job to external BOs dma-resv write slots (non-compute mode) \|
91	* Check if any userptrs invalidated since pin ------ Drop locks ---------\|
92	* Install in / out fences for job
93	* Submit job
94	* Unlock all
95	*/
96
7ee7dd6f TH	97	/*
	98	* Add validation and rebinding to the drm_exec locking loop, since both can
	99	* trigger eviction which may require sleeping dma_resv locks.
	100	*/
24f947d5	101	static int xe_exec_fn(struct drm_gpuvm_exec *vm_exec)
dd08ebf6	102	{
29f424eb	103	struct xe_vm *vm = container_of(vm_exec->vm, struct xe_vm, gpuvm);
29f424eb	104
7ee7dd6f TH	105	/* The fence slot added here is intended for the exec sched job. */
7ee7dd6f TH	106	return xe_vm_validate_rebind(vm, &vm_exec->exec, 1);
dd08ebf6 MB	107	}
dd08ebf6 MB	108
dd08ebf6 MB	109	int xe_exec_ioctl(struct drm_device dev, void data, struct drm_file *file)
	110	{
	111	struct xe_device *xe = to_xe_device(dev);
	112	struct xe_file *xef = to_xe_file(file);
	113	struct drm_xe_exec *args = data;
	114	struct drm_xe_sync __user *syncs_user = u64_to_user_ptr(args->syncs);
	115	u64 __user *addresses_user = u64_to_user_ptr(args->address);
9b9529ce	116	struct xe_exec_queue *q;
dd08ebf6 MB	117	struct xe_sync_entry *syncs = NULL;
dd08ebf6 MB	118	u64 addresses[XE_HW_ENGINE_MAX_INSTANCE];
24f947d5 TH	119	struct drm_gpuvm_exec vm_exec = {.extra.fn = xe_exec_fn};
24f947d5 TH	120	struct drm_exec *exec = &vm_exec.exec;
408c2f14	121	u32 i, num_syncs, num_ufence = 0;
dd08ebf6	122	struct xe_sched_job *job;
dd08ebf6	123	struct xe_vm *vm;
97d0047c	124	bool write_locked, skip_retry = false;
d490ecf5	125	ktime_t end = 0;
dd08ebf6 MB	126	int err = 0;
dd08ebf6 MB	127
b8c1ba83 FD	128	if (XE_IOCTL_DBG(xe, args->extensions) \|\|
	129	XE_IOCTL_DBG(xe, args->pad[0] \|\| args->pad[1] \|\| args->pad[2]) \|\|
	130	XE_IOCTL_DBG(xe, args->reserved[0] \|\| args->reserved[1]))
dd08ebf6 MB	131	return -EINVAL;
dd08ebf6 MB	132
9b9529ce FD	133	q = xe_exec_queue_lookup(xef, args->exec_queue_id);
9b9529ce FD	134	if (XE_IOCTL_DBG(xe, !q))
dd08ebf6 MB	135	return -ENOENT;
dd08ebf6 MB	136
9b9529ce	137	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_VM))
dd08ebf6 MB	138	return -EINVAL;
dd08ebf6 MB	139
eb9702ad MB	140	if (XE_IOCTL_DBG(xe, args->num_batch_buffer &&
eb9702ad MB	141	q->width != args->num_batch_buffer))
dd08ebf6 MB	142	return -EINVAL;
dd08ebf6 MB	143
4468d048	144	if (XE_IOCTL_DBG(xe, q->ops->reset_status(q))) {
dd08ebf6	145	err = -ECANCELED;
9b9529ce	146	goto err_exec_queue;
dd08ebf6 MB	147	}
	148
	149	if (args->num_syncs) {
	150	syncs = kcalloc(args->num_syncs, sizeof(*syncs), GFP_KERNEL);
	151	if (!syncs) {
	152	err = -ENOMEM;
9b9529ce	153	goto err_exec_queue;
dd08ebf6 MB	154	}
	155	}
	156
9b9529ce	157	vm = q->vm;
dd08ebf6	158
408c2f14 AD	159	for (num_syncs = 0; num_syncs < args->num_syncs; num_syncs++) {
	160	err = xe_sync_entry_parse(xe, xef, &syncs[num_syncs],
	161	&syncs_user[num_syncs], SYNC_PARSE_FLAG_EXEC \|
53bf60f6 MB	162	(xe_vm_in_lr_mode(vm) ?
53bf60f6 MB	163	SYNC_PARSE_FLAG_LR_MODE : 0));
dd08ebf6 MB	164	if (err)
dd08ebf6 MB	165	goto err_syncs;
d1df9bfb	166
408c2f14	167	if (xe_sync_is_ufence(&syncs[num_syncs]))
d1df9bfb MB	168	num_ufence++;
	169	}
	170
	171	if (XE_IOCTL_DBG(xe, num_ufence > 1)) {
	172	err = -EINVAL;
	173	goto err_syncs;
dd08ebf6 MB	174	}
dd08ebf6 MB	175
9b9529ce	176	if (xe_exec_queue_is_parallel(q)) {
dd08ebf6	177	err = __copy_from_user(addresses, addresses_user, sizeof(u64) *
9b9529ce	178	q->width);
dd08ebf6 MB	179	if (err) {
	180	err = -EFAULT;
	181	goto err_syncs;
	182	}
	183	}
	184
dd08ebf6	185	retry:
fdb6a053	186	if (!xe_vm_in_lr_mode(vm) && xe_vm_userptr_check_repin(vm)) {
dd08ebf6 MB	187	err = down_write_killable(&vm->lock);
	188	write_locked = true;
	189	} else {
	190	/* We don't allow execs while the VM is in error state */
	191	err = down_read_interruptible(&vm->lock);
	192	write_locked = false;
	193	}
	194	if (err)
	195	goto err_syncs;
	196
dd08ebf6 MB	197	if (write_locked) {
	198	err = xe_vm_userptr_pin(vm);
	199	downgrade_write(&vm->lock);
	200	write_locked = false;
	201	if (err)
	202	goto err_unlock_list;
	203	}
	204
58480c1c JRS	205	if (!args->num_batch_buffer) {
	206	err = xe_vm_lock(vm, true);
	207	if (err)
	208	goto err_unlock_list;
	209
	210	if (!xe_vm_in_lr_mode(vm)) {
	211	struct dma_fence *fence;
	212
	213	fence = xe_sync_in_fence_get(syncs, num_syncs, q, vm);
	214	if (IS_ERR(fence)) {
	215	err = PTR_ERR(fence);
	216	goto err_unlock_list;
	217	}
	218	for (i = 0; i < num_syncs; i++)
5dffaa1b	219	xe_sync_entry_signal(&syncs[i], fence);
58480c1c JRS	220	xe_exec_queue_last_fence_set(q, vm, fence);
	221	dma_fence_put(fence);
	222	}
	223
	224	xe_vm_unlock(vm);
	225	goto err_unlock_list;
	226	}
	227
24f947d5	228	vm_exec.vm = &vm->gpuvm;
24f947d5 TH	229	vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
24f947d5 TH	230	if (xe_vm_in_lr_mode(vm)) {
d2197029	231	drm_exec_init(exec, vm_exec.flags, 0);
24f947d5 TH	232	} else {
	233	err = drm_gpuvm_exec_lock(&vm_exec);
	234	if (err) {
	235	if (xe_vm_validate_should_retry(exec, err, &end))
	236	err = -EAGAIN;
d490ecf5 TH	237	goto err_unlock_list;
d490ecf5 TH	238	}
d490ecf5	239	}
dd08ebf6	240
9b9529ce	241	if (xe_vm_is_closed_or_banned(q->vm)) {
9d858b69 MB	242	drm_warn(&xe->drm, "Trying to schedule after vm is closed or banned\n");
9d858b69 MB	243	err = -ECANCELED;
d490ecf5	244	goto err_exec;
dd08ebf6 MB	245	}
dd08ebf6 MB	246
9b9529ce	247	if (xe_exec_queue_is_lr(q) && xe_exec_queue_ring_full(q)) {
97d0047c MB	248	err = -EWOULDBLOCK; /* Aliased to -EAGAIN */
97d0047c MB	249	skip_retry = true;
d490ecf5	250	goto err_exec;
8ae8a2e8 MB	251	}
8ae8a2e8 MB	252
9b9529ce	253	job = xe_sched_job_create(q, xe_exec_queue_is_parallel(q) ?
dd08ebf6 MB	254	addresses : &args->address);
	255	if (IS_ERR(job)) {
	256	err = PTR_ERR(job);
d490ecf5	257	goto err_exec;
dd08ebf6 MB	258	}
dd08ebf6 MB	259
5a091aff	260	/* Wait behind rebinds */
fdb6a053	261	if (!xe_vm_in_lr_mode(vm)) {
de8390b1 FD	262	err = xe_sched_job_add_deps(job,
	263	xe_vm_resv(vm),
	264	DMA_RESV_USAGE_KERNEL);
dd08ebf6 MB	265	if (err)
	266	goto err_put_job;
	267	}
	268
	269	for (i = 0; i < num_syncs && !err; i++)
	270	err = xe_sync_entry_add_deps(&syncs[i], job);
	271	if (err)
	272	goto err_put_job;
	273
fdb6a053	274	if (!xe_vm_in_lr_mode(vm)) {
eb9702ad MB	275	err = xe_sched_job_last_fence_add_dep(job, vm);
	276	if (err)
	277	goto err_put_job;
	278
dd08ebf6 MB	279	err = down_read_interruptible(&vm->userptr.notifier_lock);
	280	if (err)
	281	goto err_put_job;
	282
	283	err = __xe_vm_userptr_needs_repin(vm);
	284	if (err)
	285	goto err_repin;
	286	}
	287
	288	/*
	289	* Point of no return, if we error after this point just set an error on
	290	* the job and let the DRM scheduler / backend clean up the job.
	291	*/
	292	xe_sched_job_arm(job);
24f947d5 TH	293	if (!xe_vm_in_lr_mode(vm))
	294	drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, &job->drm.s_fence->finished,
	295	DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_WRITE);
dd08ebf6	296
5dffaa1b ND	297	for (i = 0; i < num_syncs; i++) {
	298	xe_sync_entry_signal(&syncs[i], &job->drm.s_fence->finished);
	299	xe_sched_job_init_user_fence(job, &syncs[i]);
	300	}
dd08ebf6	301
9b9529ce FD	302	if (xe_exec_queue_is_lr(q))
9b9529ce FD	303	q->ring_ops->emit_job(job);
eb9702ad MB	304	if (!xe_vm_in_lr_mode(vm))
eb9702ad MB	305	xe_exec_queue_last_fence_set(q, vm, &job->drm.s_fence->finished);
dd08ebf6	306	xe_sched_job_push(job);
8e41443e	307	xe_vm_reactivate_rebind(vm);
dd08ebf6	308
fdb6a053	309	if (!err && !xe_vm_in_lr_mode(vm)) {
7ba4c5f0 MB	310	spin_lock(&xe->ttm.lru_lock);
	311	ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
	312	spin_unlock(&xe->ttm.lru_lock);
	313	}
	314
dd08ebf6	315	err_repin:
fdb6a053	316	if (!xe_vm_in_lr_mode(vm))
dd08ebf6 MB	317	up_read(&vm->userptr.notifier_lock);
	318	err_put_job:
	319	if (err)
	320	xe_sched_job_put(job);
d490ecf5	321	err_exec:
24f947d5	322	drm_exec_fini(exec);
dd08ebf6	323	err_unlock_list:
023f5c8e	324	up_read(&vm->lock);
97d0047c	325	if (err == -EAGAIN && !skip_retry)
dd08ebf6 MB	326	goto retry;
dd08ebf6 MB	327	err_syncs:
408c2f14 AD	328	while (num_syncs--)
408c2f14 AD	329	xe_sync_entry_cleanup(&syncs[num_syncs]);
dd08ebf6	330	kfree(syncs);
9b9529ce FD	331	err_exec_queue:
9b9529ce FD	332	xe_exec_queue_put(q);
dd08ebf6 MB	333
	334	return err;
	335	}